Grain-drill fluke



Mel) P. M. GUNIDLAOH.

GRAIN DRILL FLUKE; v No. 329,036. Patented Oct. 27, 1885.

ATTEST: I 1 INVENTOR:

u. Puzns. PllctcrLilhagnphw, Washington 0. cv

IJNITED STATES PATENT Orricn.

PHILIP M. GUNDLAOH, OF BELLEVILLE, ILLINOIS.

GRAIN-DRILL FLUKE.

SPECIFICATION forming part of Letters Patent No. 329,036, dated October 27,1885.

Application filed February 13, 1882. Serial No. 52,573. (No model.)

To all whom it may concern.-

Be it known that I, PHILIP M. GUNDLAOH, a citizen of the United States, residing at Belleville, in the county of St. Clair, State of Illinois, have invented a certain new and useful Improvement in Flukes for Grain- Drills, &e., of which the following is a specification.

The flukes heretofore in general use for graindrills, 860., have had their bodies formed of cast-iron, with a wearing-plate of steel secured over the point portion to resist wear .in use. The defects of this construction are, first, such plates being necessarily of a parallel thickness lengthwise, are unduly heavy at all other than the greatest Wearing-point; second, owing to necessary means required for securing said plates in place, the grain-discharge opening is unduly contracted, and projections are formed which interfere with the proper dropping of the grain. To remedy these defects and form a fluke possessing the necessary requirements of lightness, strength, durability, and readiness to scour, is the object of the present invention, which consists in forming said fluke wholly of castiron, with the wearing-face of its point chilled during the process of manufacture.

To enable others skilled in the art to which myinvention appertains to make and use the same, I will now proceed to more fully describe the invention, referring to the accompanying drawings, in which- Figure 1 is a side view, with a portion of the point in section, illustrating my invention. Fig. 2 is a bottom view of same.

A represents the fluke, of any usual or required form, made tubular in its upper portion, and having a point, 0, which opens the ground to receive the seed discharged through the tubular portion of the fluke.

The point 0 is made thicker at the points exposed to greatest wear, and in order to render such portions of the required hardness to resist wear to the utmost the point portion is cast in a chill during the process of casting.

This chilling of the point portion may extend equally throughout the whole of such portion, or the chill may be gradually decreased toward the upper or main portion of the fluke.

My preferred manner of carrying out my invention is to have the chill portion of the mold act upon the outer face of the fluke-point from c to c, and on the inner face from c to 0 as clearly indicated in Fig. 1.

The advantages derived from my improvement are that the parts are strengthened at the point of greatest wear, so that the fluke will retain its proper strength after long use, and that without requiring the fluke to be made unnecessarily heavy in the first place. Further, it admits of the format-ian of a wide dischargeorifice from the'fluke interior, does not form any projection to interfere with the proper dropping of the grain, and the entire wearingface being smooth and unbroken allows a perfect scouring action to take place in use. In all of the points of construction the ordinary form of fluke possesses marked defects.

I am aware that prior to my invention graindrill flukes have been constructed wholly of cast-iron, and also that cast-iron plow-points have been cast in a chill. I therefore do not claim such constructions, broadly; but,

Having thus fully described my said invention,what1 claim as new, and desire to secure by Letters Patent, is-

1. A fluke for grain-drills, formed wholly of cast-iron, thickened at its point of greatest wear, and having its point portion chilled during the process of casting.

2. The chilled point C of a fluke for graindrills, having its chill gradually decreasing toward the main body of the fluke, as de scribed, and for the purpose set forth.

In testimony whereof witness my hand this 8th day of February, 1882.

PH. M. GUNDLAGH.

In presence of ROBERT BURNS, THEODORE PAPIN. 

